A 28-year-old man was arrested over her alleged murder after her body was found in the surrounding wooded area around the festival site.
Her parents, including her famous father John Michie, who appeared in Holby City and Coronation Street, went to the site of the festival in Lulworth, Dorset after becoming concerned for her welfare.
Michie's agent released a statement shortly after her death said: 'Sadly, I can confirm the tragic death of John Michie's daughter Louella at Bestival. John and his wife Carol ask that the privacy of their family be respected at this traumatic time.'
Detective Chief Inspector Sarah Derbyshire told The Guardian: 'Following the discovery of the woman's body we have now launched an investigation into her death.
'We have specially-trained officers supporting her family at this very difficult time.'
This article originally appeared on New Idea.